Posters are a light-weight, low-tech method for presenting student, in-progress, and late-breaking work. Poster topics range from applications of computer graphics to novel interactive techniques and in-depth research in specific areas. They are displayed throughout the conference for attendees to browse at their leisure, and poster authors meet and discuss their work with attendees during Poster Presentations.
Listen as SIGGRAPH Posters Coordinator Kurt Luther provides a nice overview.